24 results on '"Low Background Detectors"'
Search Results
2. Seasonal modulation of the 7Be solar neutrino rate in Borexino.
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Agostini, M., Altenmüller, K., Appel, S., Atroshchenko, V., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Borodikhina, L., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Caprioli, S., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., and D’Angelo, D.
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SOLAR neutrinos , *NEUTRINO interactions , *LIQUID scintillators , *SCINTILLATORS , *HILBERT-Huang transform - Abstract
We present the evidence for the seasonal modulation of the 7 Be neutrino interaction rate with the Borexino detector at the Laboratori Nazionali del Gran Sasso in Italy. The period, amplitude, and phase of the observed time evolution of the signal are consistent with its solar origin, and the absence of an annual modulation is rejected at 99.99% C.L. The data are analyzed using three methods: the analytical fit to event rate, the Lomb-Scargle and the Empirical Mode Decomposition techniques, which all yield results in excellent agreement. [ABSTRACT FROM AUTHOR]
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- 2017
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3. Low-background gamma-ray spectrometry for the international monitoring system.
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Greenwood, L.R., Cantaloub, M.G., Burnett, J.L., Myers, A.W., Overman, C.T., Forrester, J.B., Glasgow, B.G., and Miley, H.S.
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GAMMA ray spectrometer , *RADIOACTIVE aerosols , *AEROSOLS , *NITROGEN , *RADON - Abstract
PNNL has developed two low-background gamma-ray spectrometers in a new shallow underground laboratory, thereby significantly improving its ability to detect low levels of gamma-ray emitting fission or activation products in airborne particulate in samples from the IMS (International Monitoring System). The combination of cosmic veto panels, dry nitrogen gas to reduce radon and low background shielding results in a reduction of the background count rate by about a factor of 100 compared to detectors operating above ground at our laboratory. [ABSTRACT FROM AUTHOR]
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- 2017
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4. The Quest for Neutrino-less Double Beta Decay.
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Pocar, Andrea
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BETA decay ,NEUTRINO mass ,LEPTONS (Nuclear physics) ,PARTICLES (Nuclear physics) ,SENSITIVITY analysis ,RADIOACTIVE decay - Abstract
Abstract: We review the status and future of ongoing searches for neutrino-less double beta decay, a lepton-number violating nuclear decay whose existence would imply that neutrinos are their own antiparticles, i.e Majorana particles. The measurement of its decay rate is arguably the most sensitive laboratory probe of the absolute mass of neutrinos. Emphasis is given to the most promising detector technologies in the field which aim at exploring the inverted hierarchy region of neutrino masses. [Copyright &y& Elsevier]
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- 2012
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5. High precision 7Be solar neutrinos measurement and day night effect obtained with Borexino
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Testera, G., Bellini, G., Benziger, J., Bick, D., Bonetti, S., Bonfini, G., Caccianiga, B., Cadonati, L., Calaprice, F., Carraro, C., Chavarria, A., D'Angelo, D., Derbin, A., Etenko, A., Fomenko, K., Franco, D., Galbiati, C., Gazzana, S., Ghiano, C., and Giammarchi, M.
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BERYLLIUM isotopes , *SOLAR neutrinos , *NUCLEAR counters , *ASTROPHYSICS , *NUCLEAR matter , *SYMMETRY (Physics) - Abstract
Abstract: We report the direct measurement of the 7Be solar neutrino signal rate performed with the Borexino detector at the Laboratori Nazionali del Gran Sasso and the search for a day–night asymmetry of this interaction rate. The interaction rate of the 0.862MeV 7Be neutrinos is counts/(day 100ton). The hypothesis of no oscillation for this solar neutrinos is inconsistent with our measurement at the C.L. Our result is the first direct measurement of solar neutrinos with an accuracy better than 5%. We report the survival probability for solar in the transition region between matter-enhanced and vacuum-driven oscillations. The measured day night asymmetry is (stat)±0.007 (syst), in agreement with the predicition of MSW–LMA neutrino [13] oscillations. This result discourages MSW oscillations with mixing parameters in the LOW region at more than , meaning that this region is, for the first time, strongly rejected without the assumption of CPT symmetry. The result can also be used to constrain some neutrino oscillation scenarios involving new physics. [Copyright &y& Elsevier]
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- 2012
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6. Solar neutrino results from Borexino and main future perspectives
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Pallavicini, Marco, Bellini, G., Benziger, J., Bonetti, S., Buizza Avanzini, M., Caccianiga, B., Cadonati, L., Calaprice, F., Carraro, C., Chavarria, A., Dalnoki-Veress, F., D’Angelo, D., de Kerret, H., Davini, S., Derbin, A., Etenko, A., Fomenko, K., Franco, D., Galbiati, C., and Gazzana, S.
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SOLAR neutrinos , *LIQUID scintillators , *RADIOACTIVITY , *NEUTRON flux , *ELECTRONS , *PHYSICS experiments - Abstract
Abstract: Borexino is a solar neutrino experiment running at the Laboratori Nazionali del Gran Sasso, Italy. The radioactive background levels in the liquid scintillator target meet or even exceed design goals, opening unanticipated opportunities. The main results, so far, are the measurement of the 7Be solar neutrino flux (the first ever done) and the measurement of the 8B neutrino flux performed with electron energy threshold of 2.8MeV. The short and medium term perspectives are summarized in the conclusions. [Copyright &y& Elsevier]
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- 2011
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7. The liquid handling systems for the Borexino solar neutrino detector
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Alimonti, G., Arpesella, C., Avanzini, M.B., Back, H., Balata, M., Bartolomei, D., de Bellefon, A., Bellini, G., Benziger, J., Bevilacqua, A., Bondi, D., Bonetti, S., Brigatti, A., Caccianiga, B., Cadonati, L., Calaprice, F., Carraro, C., Cecchet, G., Cereseto, R., and Chavarria, A.
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LIQUID scintillators , *SOLAR neutrinos , *NUCLEAR counters , *PRESSURE , *NUCLEAR physics - Abstract
Abstract: The successful deployment of the Borexino solar neutrino detector required assorted physical and chemical operations to produce exceptional pure fluids and fill multiple detector zones. The composition and flow rates of high purity gases and liquids had to be precisely controlled to maintain liquid levels and pressures. The system was required to meet exceptional requirements for cleanliness and leak-tightness. A large scale modular system connecting fluid receiving, purification and fluid delivery processes was developed for Borexino. At the core is a flow control system that delivers scintillator components to plants for purification, and then fills the Borexino detector volumes with ultrahigh purity buffer or ultrahigh purity scintillator. The liquid handling system maintains precise control over the liquid levels and differential pressures between the different volumes of the detectors that are separated by flexible nylon vessels. The preparation, commissioning and operation of the system for filling the Borexino detector with scintillator is described. [Copyright &y& Elsevier]
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- 2009
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8. The Borexino detector at the Laboratori Nazionali del Gran Sasso
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Alimonti, G., Arpesella, C., Back, H., Balata, M., Bartolomei, D., de Bellefon, A., Bellini, G., Benziger, J., Bevilacqua, A., Bondi, D., Bonetti, S., Brigatti, A., Caccianiga, B., Cadonati, L., Calaprice, F., Carraro, C., Cecchet, G., Cereseto, R., Chavarria, A., and Chen, M.
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NUCLEAR counters , *RADIOCHEMICAL laboratories , *LIQUID scintillators , *SPECTRUM analysis , *NUCLEAR physics - Abstract
Abstract: Borexino, a large volume detector for low energy neutrino spectroscopy, is currently running underground at the Laboratori Nazionali del Gran Sasso, Italy. The main goal of the experiment is the real-time measurement of sub-MeV solar neutrinos, and particularly of the monoenergetic (862keV) 7Be electron capture neutrinos, via neutrino–electron scattering in an ultra-pure liquid scintillator. This paper is mostly devoted to the description of the detector structure, the photomultipliers, the electronics, and the trigger and calibration systems. The real performance of the detector, which always meets, and sometimes exceeds, design expectations, is also shown. Some important aspects of the Borexino project, i.e. the fluid handling plants, the purification techniques and the filling procedures, are not covered in this paper and are, or will be, published elsewhere (see Introduction and Bibliography). [Copyright &y& Elsevier]
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- 2009
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9. A scintillator purification system for the Borexino solar neutrino detector
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Benziger, J., Cadonati, L., Calaprice, F., Chen, M., Corsi, A., Dalnoki-Veress, F., Fernholz, R., Ford, R., Galbiati, C., Goretti, A., Harding, E., Ianni, Aldo, Ianni, Andrea, Kidner, S., Leung, M., Loeser, F., McCarty, K., McKinsey, D., Nelson, A., and Pocar, A.
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SOLAR neutrinos , *NEUTRINOS , *SOLAR radiation , *POROUS materials - Abstract
Abstract: Purification of the 278 tons of liquid scintillator and 889tons of buffer shielding for the Borexino solar neutrino detector is performed with a system that combines distillation, water extraction, gas stripping, and filtration. This paper describes the principles of operation, design, and construction of that purification system, and reviews the requirements and methods to achieve system cleanliness and leak-tightness. [Copyright &y& Elsevier]
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- 2008
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10. Discovery of underground argon with low level of radioactive 39Ar and possible applications to WIMP dark matter detectors
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Acosta-Kane, D., Acciarri, R., Amaize, O., Antonello, M., Baibussinov, B., Baldo Ceolin, M., Ballentine, C.J., Bansal, R., Basgall, L., Bazarko, A., Benetti, P., Benziger, J., Burgers, A., Calaprice, F., Calligarich, E., Cambiaghi, M., Canci, N., Carbonara, F., Cassidy, M., and Cavanna, F.
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DETECTORS , *DARK matter , *ARGON , *GAS reservoirs - Abstract
Abstract: We report on the first measurement of 39Ar in argon from underground natural gas reservoirs. The gas stored in the US National Helium Reserve was found to contain a low level of 39Ar. The ratio of 39Ar to stable argon was measured to be (84% C.L.), less than 5% the value in atmospheric argon (). The total quantity of argon currently stored in the National Helium Reserve is estimated at 1000tons. 39Ar represents one of the most important backgrounds in argon detectors for WIMP dark matter searches. The findings reported demonstrate the possibility of constructing large multi-ton argon detectors with low radioactivity suitable for WIMP dark matter searches. [Copyright &y& Elsevier]
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- 2008
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11. First real time detection of 7Be solar neutrinos by Borexino
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Arpesella, C., Bellini, G., Benziger, J., Bonetti, S., Caccianiga, B., Calaprice, F., Dalnoki-Veress, F., D'Angelo, D., de Kerret, H., Derbin, A., Deutsch, M., Etenko, A., Fomenko, K., Ford, R., Franco, D., Freudiger, B., Galbiati, C., Gazzana, S., Giammarchi, M., and Goeger-Neff, M.
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NEUTRINOS , *SOLAR radiation , *ENGINEERING instruments , *FLUCTUATIONS (Physics) - Abstract
Abstract: This Letter reports a direct measurement of the 7Be solar neutrino signal rate performed with the Borexino low background liquid scintillator detector at the Laboratori Nazionali del Gran Sasso. This is the first real-time spectral measurement of sub-MeV solar neutrinos. The result for 0.862 MeV 7Be neutrinos is counts/(day ⋅ 100 ton), consistent with predictions of Standard Solar Models and neutrino oscillations with LMA-MSW parameters. [Copyright &y& Elsevier]
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- 2008
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12. Low-222Rn nitrogen gas generator for ultra-low background counting systems
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Wójcik, M. and Zuzel, G.
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SEPARATION (Technology) , *INTERSTELLAR medium , *LIQUEFIED gases , *SURFACE chemistry - Abstract
Abstract: A new stand-alone system for purification of boil-off nitrogen from 222Rn is described. The purification principle is based on the radon adsorption on charcoal at low temperatures (cryo-adsorption). The device can be attached to ordinary dewars, which are usually used for liquid nitrogen storage or transportation. The measured 222Rn concentration in unpurified boil-off nitrogen is in the range of 0.5mBq/m3, while the unit described can supply ultra-low background detectors (e.g. gamma spectrometers or dark matter detectors) with gaseous nitrogen of 222Rn specific activity lower by a factor ∼40. The lowest concentration achieved was 12±3μBq/m3. Using a 100-l dewar it is possible to produce effectively at least 40m3 of highly pure gas with the available rate between 0.3 and 2.5m3/h. The nitrogen flux can be set by adjusting the power to an electrical heater placed inside the dewar. [Copyright &y& Elsevier]
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- 2005
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13. The liquid xenon set-up of the DAMA experiment
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Bernabei, R., Belli, P., Bussolotti, A., Cappella, F., Cerulli, R., Dai, C.J., Incicchitti, A., Mattei, A., Montecchia, F., and Prosperi, D.
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SCINTILLATORS , *NOBLE gases , *LIQUEFIED gases - Abstract
The main features of the low background DAMA pure liquid xenon scintillator set-up running deep underground in the Gran Sasso National Laboratory of the INFN are described. [Copyright &y& Elsevier]
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- 2002
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14. Seasonal Modulation of the $^7$Be Solar Neutrino Rate in Borexino
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Michael Wurm, F. von Feilitzsch, Aldo Romani, K. Choi, L. Di Noto, M. Carlini, B. Neumair, K. Fomenko, L. Papp, Alessandra Re, Fausto Ortica, J. Martyn, E. Litvinovich, G. Zuzel, D. Basilico, N. Rossi, Matteo Agostini, R. Tartaglia, E. V. Hungerford, Jay Burton Benziger, O. Zaimidoroga, Aldo Ianni, B. Opitz, Z. Yokley, H. Wang, Xuefeng Ding, D. Jeschke, Andrea Ianni, D. Bick, Sandra Zavatarelli, S. Davini, Kai Zuber, V. V. Kobychev, G. Testera, A. Sotnikov, F. Froborg, V. Atroshchenko, F. Lombardi, G. Bonfini, K. Altenmüller, Denis Korablev, Gioacchino Ranucci, P. Shakina, D. A. Semenov, I. N. Machulin, Cristiano Galbiati, Lino Miramonti, A. Razeto, Frank Calaprice, D. Kryn, Michele Montuschi, Manuel Meyer, R. B. Vogelaar, Marco Pallavicini, S. Caprioli, Y. Suvorov, D. D'Angelo, Livia Ludhova, J. Thurn, R. Roncin, Paolo Lombardi, A. M. Goretti, A. S. Chepurnov, Marco Giammarchi, A. Vishneva, M. Goeger-Neff, C. Ghiano, V. N. Muratova, A. Jany, G. Lukyanchenko, Caren Hagner, S. Appel, S. Schönert, Lothar Oberauer, P. Cavalcante, A. V. Derbin, M. Misiaszek, G. Bellini, Matthias Laubenstein, S. Marcocci, L. Borodikhina, M. Toropova, G. Korga, A. Caminata, F. Gabriele, M. Gromov, B. Caccianiga, T. Houdy, M. M. Wojcik, L.F.F. Stokes, E. Meroni, I. S. Drachnev, D. Bravo, B. Lehnert, S. Weinz, S. Manecki, D. Franco, G. Manuzio, A. Pocar, O. Smirnov, E. V. Unzhakov, M. D. Skorokhvatov, AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), BOREXINO, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Agostini, M., Altenmueller, K., Appel, S., Atroshchenko, V., Basilico, D., Bellini, G., Benziger, J., Bick, D., Bonfini, G., Borodikhina, L., Bravo, D., Caccianiga, B., Calaprice, F., Caminata, A., Caprioli, S., Carlini, M., Cavalcante, P., Chepurnov, A., Choi, K., D'Angelo, D., Davini, S., Derbin, A., Ding, X. F., Di Noto, L., Drachnev, I., Fomenko, K., Franco, D., Froborg, F., Gabriele, F., Galbiati, C., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Gromov, M., Hagner, C., Houdy, T., Hungerford, E., Ianni, Aldo, Ianni, Andrea, Jany, A., Jeschke, D., Kobychev, V., Korablev, D., Korga, G., Kryn, D., Laubenstein, M., Lehnert, B., Litvinovich, E., Lombardi, F., Lombardi, P., Ludhova, L., Lukyanchenko, G., Machulin, I., Manecki, S., Manuzio, G., Marcocci, S., Martyn, J., Meroni, E., Meyer, M., Miramonti, L., Misiaszek, M., Montuschi, M., Muratova, V., Neumair, B., Oberauer, L., Opitz, B., Ortica, F., Pallavicini, M., Papp, L., Pocar, A., Ranucci, G., Razeto, A., Re, A., Romani, A., Roncin, R., Rossi, N., Schoenert, S., Semenov, D., Shakina, P., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Stokes, L. F. F., Suvorov, Y., Tartaglia, R., Testera, G., Thurn, J., Toropova, M., Unzhakov, E., Vishneva, A., Vogelaar, R. B., von Feilitzsch, E., Wang, H., Weinz, S., Wojcik, M., Wurm, M., Yokley, Z., Zaimidoroga, O., Zavatarelli, S., Zuber, K., Zuzel, G., AstroParticule et Cosmologie ( APC - UMR 7164 ), and Centre National de la Recherche Scientifique ( CNRS ) -Institut National de Physique Nucléaire et de Physique des Particules du CNRS ( IN2P3 ) -Observatoire de Paris-Université Paris Diderot - Paris 7 ( UPD7 ) -Commissariat à l'énergie atomique et aux énergies alternatives ( CEA )
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liquid scintillators detectors ,Physics - Instrumentation and Detectors ,experimental methods ,neutrino: solar ,Physics::Instrumentation and Detectors ,Solar neutrino ,low background detectors ,Solar neutrinos ,01 natural sciences ,flux: time dependence ,neutrino: flux ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Liquid scintillators detectors ,Low background detectors ,Neutrino oscillations ,Astronomy and Astrophysics ,[ PHYS.PHYS.PHYS-INS-DET ] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Borexino ,neutrino: interaction ,MSW effect ,Physics ,Detector ,Astrophysics::Instrumentation and Methods for Astrophysics ,Instrumentation and Detectors (physics.ins-det) ,neutrino electron: elastic scattering ,modulation ,Amplitude ,Modulation ,solar neutrinos ,Neutrino ,Liquid scintillators detector ,FLUX ,Low background detector ,data analysis method ,Neutrino oscillation ,FOS: Physical sciences ,Nuclear physics ,TIME-SERIES ANALYSIS ,[ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex] ,SEARCH ,0103 physical sciences ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,SPACED DATA ,010306 general physics ,background: radioactivity ,neutrino oscillations ,010308 nuclear & particles physics ,EMPIRICAL MODE DECOMPOSITION ,beryllium ,Gran Sasso ,High Energy Physics::Experiment ,neutrino: oscillation ,Event (particle physics) ,experimental results - Abstract
We detected the seasonal modulation of the $^7$Be neutrino interaction rate with the Borexino detector at the Laboratori Nazionali del Gran Sasso in Italy. The period, amplitude, and phase of the observed time evolution of the signal are consistent with its solar origin, and the absence of an annual modulation is rejected at 99.99\% C.L. The data are analyzed using three methods: the sinusoidal fit, the Lomb-Scargle and the Empirical Mode Decomposition techniques, which all yield results in excellent agreement., Comment: 11 palese, 13 figures
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- 2017
15. First real time detection of 7Be solar neutrinos by Borexino
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A. Martemianov, S. Gazzana, K. McCarty, Andrew Sonnenschein, Malcolm J. Joyce, M. Misiaszek, Cristiano Galbiati, S. Vitale, G. Manuzio, S. Hardy, C. Salvo, O. Smirnov, Hardy Simgen, Matthias Laubenstein, V. Muratova, M. E. Monzani, O. Zaimidoroga, A. Pocar, Andrea Ianni, Sandra Zavatarelli, A.V. Etenko, Aldo Ianni, M. Goeger-Neff, G. Testera, A. Razeto, Livia Ludhova, V. G. Tarasenkov, D. Franco, F. Dalnoki-Veress, R. Tartaglia, L. Papp, G. Bellini, R. J. Ford, R. S. Raghavan, Marco Giammarchi, C. Arpesella, S. Bonetti, Marcin Wójcik, G. Korga, D. Kryn, Fausto Masetti, A. A. Sabelnikov, Paolo Lombardi, M. Skorokhvatov, C. Grieb, S. V. Sukhotin, Y. Suvorov, R. B. Vogelaar, Martin Deutsch, S. Schönert, L. Oberauer, M. Obolensky, H. de Kerret, L. Perasso, Fausto Ortica, I. Machulin, E. Litvinovich, B. Caccianiga, F. Calaprice, F. von Feilitzsch, L. Niedermeier, Michael K.H. Leung, B. Freudiger, Marco Pallavicini, D. D'Angelo, K. Fomenko, J. Benziger, G. Zuzel, A. Sotnikov, A. Derbin, E. Meroni, A. Goretti, G. Heusser, Gioacchino Ranucci, D. Montanari, D. Vignaud, Lino Miramonti, APC - Neutrinos, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), AstroParticule et Cosmologie (APC (UMR_7164)), Borexino, Arpesella, C., Suvorov, Y., Et, Al., Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)
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Low background detector ,Nuclear and High Energy Physics ,Particle physics ,Liquid scintillator ,Neutrino oscillation ,[SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] ,Physics::Instrumentation and Detectors ,Solar neutrino ,FOS: Physical sciences ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Astrophysics ,01 natural sciences ,7. Clean energy ,Neutrino Oscillations ,[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] ,Nuclear physics ,High Energy Physics - Phenomenology (hep-ph) ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment ,010306 general physics ,Borexino ,Physics ,ICARUS ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,010308 nuclear & particles physics ,Astrophysics (astro-ph) ,High Energy Physics::Phenomenology ,Solar neutrino problem ,Low Background Detectors ,Liquid Scintillators ,3. Good health ,Solar Neutrinos ,High Energy Physics - Phenomenology ,Neutrino detector ,[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] ,Measurements of neutrino speed ,High Energy Physics::Experiment ,Neutrino - Abstract
This paper reports a direct measurement of the Be7 solar neutrino signal rate performed with the Borexino low background liquid scintillator detector. This is the first real-time spectral measurement of sub-MeV solar neutrinos. The result for 0.862 MeV Be7 is 47 +- 7 (stat} +- 12 (sys} counts/(day x 100 ton), consistent with predictions of Standard Solar Models and neutrino oscillations with LMA-MSW parameters., Paper submitted to PRLB. 9 pages, 6 figures (EPS) PDF files included into tar.gz file, together with LaTeX source, eps figs and style files
- Published
- 2008
16. The IAXO Helioscope
- Author
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I. Savvidis, I. G. Irastorza, I. Ortega, Toyokazu Sekiguchi, K Saikawa, M. Davenport, Serkant Ali Cetin, C. Eleftheriadis, C. Krieger, D. Chelouche, O. Limousin, Charles J. Hailey, P. Vedrine, G. Fanourakis, S. Caspi, Gianpaolo Carosi, Javier Redondo, A. Tomás, Ioannis Giomataris, Javier Galan, Hector Gomez, Pierre Sikivie, A.C. Jakobsen, S. Russenschuck, J. G. Garza, F.J. Iguaz, Kenichi Imai, K. van Bibber, Pierre Brun, Marin Karuza, A. Dael, Takashi Hiramatsu, S. Gninenko, A. Lindner, M. Betz, Dieter H. H. Hoffmann, A. Liolios, Jochen Kaminski, E. Ferrer Ribas, Theodoros Geralis, V. N. Muratova, Julia Vogel, Yannis K. Semertzidis, Theodoros Vafeiadis, Babette Döbrich, Sergey Troitsky, G. Luzón, A. V. Derbin, D. González-Díaz, Michael J. Pivovaroff, F. T. Avignone, J. A. Garcia, Joerg Jaeckel, Amanda Weltman, W. C. Wester, Georg G. Raffelt, Masahiro Kawasaki, A. Dudarev, Andreas Ringwald, Krešimir Jakovčić, T. Dafni, Milica Krčmar, J.A. Villar, A. Diago, Eduardo Guendelman, Konstantin Zioutas, Dieter Horns, Klaus Kurt Desch, J. Ruz, J. M. Carmona, Giovanni Cantatore, Benito Gimeno, F.E. Christensen, P. Brax, T. Papaevangelou, L. Walckiers, Jordi Isern, Konstantinos Kousouris, I. Dratchnev, I. Shilon, Fritz Caspers, C. Nones, S. Matsuki, S. C. Yildiz, Biljana Lakić, H. H. J. ten Kate, E. Armengaud, H. Silva, Ribas, E. Ferrer, Armengaud, E., Avignone, F. T., Betz, M., Brax, P., Brun, P., Cantatore, Giovanni, Carmona, J. M., Carosi, G. P., Caspers, F., Caspi, S., Cetin, S. A., Chelouche, D., Christensen, F. E., Dael, A., Dafni, T., Davenport, M., Derbin, A. V., Desch, K., Diago, A., Döbrich, B., Dratchnev, I., Dudarev, A., Eleftheriadis, C., Fanourakis, G., Galán, J., García, J. A., Garza, J. G., Geralis, T., Gimeno, B., Giomataris, I., Gninenko, S., Gómez, H., González Diaz, D., Guendelman, E., Hailey, C. J., Hiramatsu, T., Hoffmann, D. H. H., Horns, D., Iguaz, F. J., Irastorza, I. G., Isern, J., Imai, K., Jaeckel, J., Jakobsen, A. C., Jakovčić, K., Kaminski, J., Kawasaki, M., Karuza, M., Krčmar, M., Kousouris, K., Krieger, C., Lakić, B., Limousin, O., Lindner, A., Liolios, A., Luzón, G., Matsuki, S., Muratova, V. N., Nones, C., Ortega, I., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Redondo, J., Ringwald, A., Russenschuck, S., Ruz, J., Saikawa, K., Savvidis, I., Sekiguchi, T., Semertzidis, Y. K., Shilon, I., Sikivie, P., Silva, H., Ten Kate, H. H. J., Tomas, A., Troitsky, S., Vafeiadis, T., Van Bibber, K., Vedrine, P., Villar, J. A., Vogel, J. K., Walckiers, L., Weltman, A., Wester, W., Yildiz, S. C., Zioutas, K., Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, TR3959, and Çetin, Serkant Ali
- Subjects
History ,Particle physics ,QCD axion ,Dark matter ,X-ray optics ,Detectable Signal ,7. Clean energy ,magnetic helioscope ,dark matter ,Education ,Solar tracker ,Optics ,QCD axions ,ddc:530 ,Detectors and Experimental Techniques ,Axion ,Physics ,Helioscope ,Fourth Generation ,business.industry ,Technical Design ,Detector ,MicroMegas detector ,Toroidal Magnets ,Low Background Detectors ,Computer Science Applications ,Magnet ,ComputingMethodologies_DOCUMENTANDTEXTPROCESSING ,Feasibility Studies ,X-ray Focusing Optics ,business - Abstract
Çetin, Serkant Ali (Dogus Author) -- Conference full title: 7th International Symposium on Large TPCs for Low-Energy Rare Event Detection; Institute of Astroparticle Physics (APC) Campus - Paris Diderot UniversityParis; France; 15 December 2014 through 17 December 2014 The IAXO (International Axion Experiment) is a fourth generation helioscope with a sensitivity, in terms of detectable signal counts, at least 104 better than CAST phase-I, resulting in sensitivity on gaγ one order of magnitude better. To achieve this performance IAXO will count on a 8-coil toroidal magnet with 60 cm diameter bores and equipped with X-ray focusing optics into 0.20 cm2 spots coupled to ultra-low background Micromegas X-ray detectors. The magnet will be on a platform that will allow solar tracking for 12 hours per day. The next short term objectives are to prepare a Technical Design Report and to construct the first prototypes of the hardware main ingredients: demonstration coil, X-ray optics and low background detector while refining the physics case and studying the feasibility studies for Dark Matter axions.
- Published
- 2015
17. The liquid xenon set-up of the DAMA experiment
- Author
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R. Cerulli, A. Mattei, A. Bussolotti, P. Belli, F. Cappella, C. Dai, A. Incicchitti, F. Montecchia, R. Bernabei, and D. Prosperi
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Physics ,Nuclear and High Energy Physics ,Settore FIS/01 - Fisica Sperimentale ,Dark matter ,chemistry.chemical_element ,Liquid noble gases ,Low background detectors ,Scintillation detectors ,Scintillator ,Settore FIS/04 - Fisica Nucleare e Subnucleare ,Nuclear physics ,Xenon ,WIMP ,chemistry ,National laboratory ,Instrumentation - Abstract
The main features of the low background DAMA pure liquid xenon scintillator set-up running deep underground in the Gran Sasso National Laboratory of the INFN are described. (C) 2002 Elsevier Science B.V. All rights reserved.
- Published
- 2002
18. Search for solar Axion Like Particles in the low energy range at CAST
- Author
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Giovanni Cantatore, G. Raiteri, Marin Karuza, V. Lozza, Cantatore, Giovanni, Karuza, Marin, Lozza, Valentina, and Raiteri, Giancarlo
- Subjects
Physics ,Nuclear and High Energy Physics ,Range (particle radiation) ,solar axion ,Photon ,Physics::Instrumentation and Detectors ,low background detectors ,Flux ,Elementary particle ,Astrophysics ,Avalanche photodiode ,Physics::Geophysics ,Computational physics ,Massless particle ,Particle decay ,low background detector ,solar axions ,CAST ,Instrumentation ,Axion - Abstract
Axion Like Particles (ALPs) could be continuously produced in the Sun via the Primakoff process. The ALP flux could be seen on Earth by observing the photons produced by the ALP decay. The expected energy distribution of reconverted photons is peaked at 3 keV. There could be, however, a low energy tail due to various processes active in the Sun. We report results of the first test measurements in the low energy range performed at CAST along with a description of the experimental setup. Future detector developments are discussed and preliminary results on a liquid nitrogen cooled Avalanche Photodiode are presented.
- Published
- 2010
19. Future axion searches with the International Axion Observatory (IAXO)
- Author
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C. Krieger, A. Lindner, Javier Redondo, Biljana Lakić, L. Walckiers, Pierre Sikivie, Joerg Jaeckel, A. Tomás, Ioannis Giomataris, Iratxe Ortega, K Saikawa, Hector Gomez, Jochen Kaminski, Takashi Hiramatsu, F.J. Iguaz, H. H. J. ten Kate, Milica Krčmar, Anders Clemen Jakobsen, Dieter H. H. Hoffmann, F. T. Avignone, Theodoros Vafeiadis, Krešimir Jakovčić, H. Silva, J.A. Villar, Javier Galan, B. Döbrich, I. Shilon, C. J. Hailey, Jordi Isern, J. G. Garza, A. Diago, Michael J. Pivovaroff, Konstantin Zioutas, S. C. Yildiz, W. C. Wester, Theodoros Geralis, S. Caspi, A. Dael, S. Gninenko, Julia Vogel, K. van Bibber, Toyokazu Sekiguchi, G. Luzón, M. Davenport, Georg G. Raffelt, Finn Erland Christensen, Sergey Troitsky, J. Ruz, Masahiro Kawasaki, Giovanni Cantatore, A. V. Derbin, A. Liolios, C. Eleftheriadis, Dieter Horns, B. Gimeno, T. Papaevangelou, J. M. Carmona, A. Dudarev, Eduardo Guendelman, Andreas Ringwald, Serkant Ali Cetin, I. G. Irastorza, P. Vedrine, G. Fanourakis, I. Savvidis, T. Dafni, S. Russenschuck, E. Ferrer-Ribas, Klaus Kurt Desch, J. A. Garcia, Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, TR3959, Çetin, Serkant Ali, I. G., Irastorza, F. T., Avignone, Cantatore, Giovanni, J. M., Carmona, S., Caspi, S. A., Cetin, F. E., Christensen, A., Dael, T., Dafni, M., Davenport, A. V., Derbin, K., Desch, A., Diago, B., Döbrich, A., Dudarev, C., Eleftheriadi, G., Fanouraki, E., Ferrer Riba, J., Galán, J. A., García, J. G., Garza, T., Gerali, B., Gimeno, I., Giomatari, S., Gninenko, H., Gómez, E., Guendelman, C. J., Hailey, T., Hiramatsu, D. H. H., Hoffmann, D., Horn, F. J., Iguaz, J., Isern, A. C., Jakobsen, J., Jaeckel, K., Jakovčić, J., Kaminski, M., Kawasaki, M., Krčmar, C., Krieger, B., Lakić, A., Lindner, A., Liolio, G., Luzón, I., Ortega, T., Papaevangelou, M. J., Pivovaroff, G., Raffelt, J., Redondo, A., Ringwald, S., Russenschuck, J., Ruz, K., Saikawa, I., Savvidi, T., Sekiguchi, I., Shilon, P., Sikivie, H., Silva, H., ten Kate, A., Toma, S., Troitsky, T., Vafeiadi, K., van Bibber, P., Vedrine, J. A., Villar, J. K., Vogel, L., Walckier, W., Wester, S. C., Yildiz, and K., Zioutas
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Physics ,History ,Particle physics ,solar axion ,Orders of Magnitude ,010308 nuclear & particles physics ,Rare event detection ,Single photon detectors ,Low Background Detectors ,01 natural sciences ,dark matter ,White Dwarfs ,Computer Science Applications ,Education ,Low energy ,Observatory ,0103 physical sciences ,solar axions ,ddc:530 ,X-ray Focusing Optics ,010306 general physics ,Axion - Abstract
Çetin, Serkant Ali (Dogus Author) -- Conference full title: 6th Symposium on Large TPCs for Low Energy Rare Event Detection; Paris; France; 17 December 2012 through 19 December 2012. The International Axion Observatory (IAXO) is a new generation axion helioscope aiming at a sensitivity to the axion-photon coupling of gaγ ∼ few × 10-12 GeV-1, i.e. 1-1.5 orders of magnitude beyond the one achieved by CAST, currently the most sensitive axion helioscope. The main elements of IAXO are an increased magnetic field volume together with extensive use of x-ray focusing optics and low background detectors, innovations already successfully tested in CAST. Additional physics cases of IAXO could include the detection of electron-coupled axions invoked to explain the white dwarf cooling, relic axions, and a large variety of more generic axion-like particles (ALPs) and other novel excitations at the low-energy frontier of elementary particle physics.
- Published
- 2013
20. High precision 7Be solar neutrinos measurement and day night effect obtained with Borexino
- Author
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Matthias Laubenstein, Cristiano Galbiati, B. Loer, Yusuke Koshio, G. Bellini, D. Montanari, M. D. Skorokhvatov, S. V. Sukhotin, O. Zaimidoroga, A. E. Chavarria, P. J. Mosteiro, F. Lombardi, L. Perasso, Michael Wurm, L. Grandi, A. Razeto, V. V. Kobychev, Michael K.H. Leung, Y. Suvorov, L. Miramonti, D. Vignaud, A.V. Etenko, T. Lewke, D. Kryn, R. Saldanha, Q. Meindl, M. Göger-Neff, M. Obolensky, S. Schönert, B. Caccianiga, R. B. Vogelaar, Jay Burton Benziger, A. V. Derbin, Marco Giammarchi, C. Carraro, S. Bonetti, D. Franco, E. Litvinovich, I. N. Machulin, R. Tartaglia, Andrea Ianni, D. Bick, Sandra Zavatarelli, C. Ghiano, Lothar Oberauer, Marco Pallavicini, D. D'Angelo, M. M. Wojcik, E. Guardincerri, Aldo Romani, C. Salvo, F. von Feilitzsch, Carlos Pena-Garay, S. Gazzana, A. Sotnikov, W. Maneschg, S. Hardy, M. Misiaszek, Laura Cadonati, S. Perasso, L. Papp, Gioacchino Ranucci, G. Bonfini, Frank Calaprice, Aldo Ianni, Livia Ludhova, Fausto Ortica, Hardy Simgen, G. Zuzel, A. M. Goretti, V. N. Muratova, E. Meroni, J. Winter, G. Korga, K. Fomenko, Denis Korablev, A. A. Sabelnikov, A. Pocar, G. Testera, O. Smirnov, R. S. Raghavan, G. Manuzio, S. Manecki, Paolo Lombardi, Testera, G., Bellini, G., Benziger, J., Bick, D., Bonetti, S., Bonfini, G., Caccianiga, B., Cadonati, L., Calaprice, F., Carraro, C., Chavarria, A., D'Angelo, D., Derbin, A., Etenko, A., Fomenko, K., Franco, D., Galbiati, C., Gazzana, S., Ghiano, C., Giammarchi, M., Goeger-Neff, M., Goretti, A., Grandi, L., Guardincerri, E., Hardy, S., Ianni, Aldo, Ianni, Andrea, Korablev, D., Kobychev, V., Korga, G., Koshio, Y., Kryn, D., Laubenstein, M., Leung, M., Lewke, T., Litvinovich, E., Loer, B., Lombardi, P., Lombardi, F., Ludhova, L., Machulin, I., Manecki, S., Maneschg, W., Manuzio, G., Meindl, Q., Meroni, E., Miramonti, L., Misiaszek, M., Montanari, D., Mosteiro, P., Muratova, V., Oberauer, L., Obolensky, M., Ortica, F., Pallavicini, M., Papp, L., Pena-Garay, C., Perasso, L., Perasso, S., Pocar, A., Raghavan, R. S., Ranucci, G., Razeto, A., Romani, A., Sabelnikov, A., Saldanha, R., Salvo, C., Schoenert, S., Simgen, H., Skorokhvatov, M., Smirnov, O., Sotnikov, A., Sukhotin, S., Suvorov, Y., Tartaglia, R., Vignaud, D., Vogelaar, R. B., von Feilitzsch, F., Winter, J., Wojcik, M., Wurm, M., Zaimidoroga, O., Zavatarelli, S., and Zuzel, G.
- Subjects
Low background detector ,Nuclear and High Energy Physics ,Particle physics ,Neutrino oscillation ,Physics::Instrumentation and Detectors ,CPT symmetry ,media_common.quotation_subject ,Solar neutrino ,Physics beyond the Standard Model ,low background detectors ,liquid scintillators ,Asymmetry ,Nuclear physics ,ENHANCEMENT ,OSCILLATIONS ,DETECTOR ,Instrumentation ,Borexino ,media_common ,Physics ,Liquid ,neutrino oscillations ,scintillator ,solar neutrinos ,Measurements of neutrino speed ,High Energy Physics::Experiment ,Astrophysics::Earth and Planetary Astrophysics ,Neutrino ,MATTER - Abstract
We report the direct measurement of the 7 Be solar neutrino signal rate performed with the Borexino detector at the Laboratori Nazionali del Gran Sasso and the search for a day–night asymmetry of this interaction rate. The interaction rate of the 0.862 MeV 7 Be neutrinos is 46 ± 1.6 ( stat ) − 1.6 + 1.5 ( syst ) counts/(day · 100 ton). The hypothesis of no oscillation for this solar neutrinos is inconsistent with our measurement at the 5.8 σ C.L. Our result is the first direct measurement of solar neutrinos with an accuracy better than 5%. We report the survival probability for solar ν e in the transition region between matter-enhanced and vacuum-driven oscillations. The measured day night asymmetry is A dn = 0.001 ± 0.012 (stat)±0.007 (syst), in agreement with the predicition of MSW–LMA neutrino [13] oscillations. This result discourages MSW oscillations with mixing parameters in the LOW region at more than 8.5 σ , meaning that this region is, for the first time, strongly rejected without the assumption of CPT symmetry. The result can also be used to constrain some neutrino oscillation scenarios involving new physics.
- Published
- 2012
21. Search for Sub-eV Mass Solar Axions by the CERN Axion Solar Telescope with (3)He Buffer Gas
- Author
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M, Arik, S, Aune, K, Barth, A, Belov, S, Borghi, H, Bräuninger, G, Cantatore, J M, Carmona, S A, Cetin, J I, Collar, T, Dafni, M, Davenport, C, Eleftheriadis, N, Elias, C, Ezer, G, Fanourakis, E, Ferrer-Ribas, P, Friedrich, J, Galán, J A, García, A, Gardikiotis, E N, Gazis, T, Geralis, I, Giomataris, S, Gninenko, H, Gómez, E, Gruber, T, Guthörl, R, Hartmann, F, Haug, M D, Hasinoff, D H H, Hoffmann, F J, Iguaz, I G, Irastorza, J, Jacoby, K, Jakovčić, M, Karuza, K, Königsmann, R, Kotthaus, M, Krčmar, M, Kuster, B, Lakić, J M, Laurent, A, Liolios, A, Ljubičić, V, Lozza, G, Lutz, G, Luzón, J, Morales, T, Niinikoski, A, Nordt, T, Papaevangelou, M J, Pivovaroff, G, Raffelt, T, Rashba, H, Riege, A, Rodríguez, M, Rosu, J, Ruz, I, Savvidis, P S, Silva, S K, Solanki, L, Stewart, A, Tomás, M, Tsagri, K, van Bibber, T, Vafeiadis, J A, Villar, J K, Vogel, S C, Yildiz, K, Zioutas, Arik, M., Aune, S., Barth, K., Belov, A., Borghi, S., Brauninger, H., Cantatore, Giovanni, Carmona, J. M., Cetin, S. A., Collar, J. I., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Ezer, C., Fanourakis, G., Ferrer Ribas, E., Friedrich, P., Galan, J., Garcia, J. A., Gardikiotis, A., Gazis, E. N., Geralis, T., Giomataris, I., Gninenko, S., Gomez, H., Gruber, E., Guthorl, T., Hartmann, R., Haug, F., Hasinoff, M. D., Hoffmann, D. H. H., Iguaz, F. J., Irastorza, I. G., Jacoby, J., Jakovcic, K., Karuza, M., Konigsmann, K., Kotthaus, R., Krcmar, M., Kuster, M., Lakic, B., Laurent, J. M., Liolios, A., Ljubicic, A., Lozza, Valentina, Lutz, G., Luzon, G., Morales, J., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Rashba, T., Riege, H., Rodriguez, A., Rosu, M., Ruz, J., Savvidis, I., Silva, P. S., Solanki, S. K., Stewart, L., Tomas, A., Tsagri, M., van Bibber, K., Vafeiadis, T., Villar, J. A., Vogel, J. K., Yildiz, S. C., and Zioutas, K.
- Subjects
solar axion ,low background detectors ,solar axions ,photons ,dark matter - Abstract
The CERN Axion Solar Telescope (CAST) has extended its search for solar axions by using (3)He as a buffer gas. At T=1.8 K this allows for larger pressure settings and hence sensitivity to higher axion masses than our previous measurements with (4)He. With about 1 h of data taking at each of 252 different pressure settings we have scanned the axion mass range 0.39 eV≲m(a)≲0.64 eV. From the absence of excess x rays when the magnet was pointing to the Sun we set a typical upper limit on the axion-photon coupling of g(aγ)≲2.3×10(-10) GeV(-1) at 95% C.L., the exact value depending on the pressure setting. Kim-Shifman-Vainshtein-Zakharov axions are excluded at the upper end of our mass range, the first time ever for any solar axion search. In the future we will extend our search to m(a)≲1.15 eV, comfortably overlapping with cosmological hot dark matter bounds.
- Published
- 2011
22. Search for solar ALPS in the low energy range at CAST
- Author
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CANTATORE, GIOVANNI, LOZZA, VALENTINA, Karuza M., Jaeckel J., Lindner A., Redondo J., Cantatore, Giovanni, Karuza, M., and Lozza, Valentina
- Subjects
Axion ,WIMP ,Axions ,WIMPs ,dark matter ,low background detectors - Abstract
It has been shown that a detector system, sensitive to single photons in the eV range can be coupled to the CAST experiment [1]. However the detectors used had high background rates compared with the expected signal, thus a search for a detector suitable for integrating in the present setup and with a low background rates was initiated. A suitable detector candidate was found and results from first tests are presented.
- Published
- 2010
23. The Borexino detector at the Laboratori Nazionali del Gran Sasso
- Author
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V. Vyrodov, D. Bondi, Malcolm J. Joyce, Laura Cadonati, T. Goldbrunner, T. Hertich, E. de Haas, O. Smirnov, F. von Feiltitsch, M. Misiaszek, W. Czech, Matthias Laubenstein, A. de Bellefon, A. Martemiano, W. Maneschg, Stefano Nisi, M. Marchelli, M. Parodi, Stefano Bonetti, D. Manuzio, Marco Pallavicini, V. M. Gehman, A. Alimonti, Augusto Brigatti, D. Bartolomei, Fausto Ortica, D. D'Angelo, Michael Wurm, Andrew Sonnenschein, I. Machulin, A. Bevilacqua, E. Litvinovich, P. Musico, G. Di Pietro, G. Testera, K. McCarty, R. von Hentig, A. Cubauu, M. Orsini, Sandra Malvezzi, M. E. Monzani, J. Benziger, P. Saggese, J. Kiko, Q. Meindl, S. Parmeggiano, D. Rountree, J. Maneira, A. Di Credico, B. William, Daniel McKinsey, A. Manco, V. Muratova, B. Caccianiga, P.H. La Marche, R. Scardaoni, Aldo Romani, F. Calaprice, L. Papp, B. Freudiger, Ugo Mazzucato, F. Soricelli, D. Vignaud, G. Ceccet, L. Niedermeier, Michael K.H. Leung, A. Pocar, H. Neder, S. Hardy, M. Goeger-Neff, T. A. Shutt, R. Fernholz, G. Manuzio, K. H. Schubeck, Till Kirsten, I. Manno, Cristiano Galbiati, C. Sule, Mikael Hult, A. Nelson, D. Loeser, Danilo Giugni, R. Ceresto, Hardy Simgen, D. Schimizzi, D. Franco, F. Dalnoki-Veress, R. Eisenstein, S. Gazzana, A. Chen, K. Fomenko, V. Lagomarsino, A. de Bari, D. Kryne, C. Carraro, K. Jaenner, S. Vital, R. Tartaglia, E. Harding, D. Montanari, M. Skorokhvatov, G. Bellini, A. A. Sabelnikov, C. Arpesella, R. B. Vogelaar, R. Wordel, S. Schönert, Lino Miramonti, A. Golubchikov, S. Kidner, T. Lewke, C. Lendvai, Martin Deutsch, G. Heusser, A. Derbin, Marcin Wójcik, C. Grieb, Elisa Resconi, E. Meroni, Andrea Ianni, Sandra Zavatarelli, Gioacchino Ranucci, R. S. Raghavan, H.O. Back, Fausto Elisei, G. Korga, R. Saldhana, Y. Suvorov, L. Oberauer, A. Sotnikov, G. Korschnik, M. Gärtner, A. E. Chavarria, L. Perasso, S. V. Sukhotin, V. V. Kobychev, M. Obolensky, H. de Kerret, G. Zuzel, Y. Kozlov, Fausto Masetti, Paolo Lombardi, A.V. Etenko, A. Goretti, Livia Ludhova, W. Hampel, A. S. Chepurnov, M. Balata, F. Siccardi, C. Salvo, B. Loer, C. Hagner, W. Rau, O. Zaimidoroga, P. Risso, F. Gattig, V. G. Tarasenkov, F. Hartmann, Nicomede Pelliccia, A. Razeto, A. Di Ldovico, R. J. Ford, Marco Giammarchi, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), APC - Neutrinos, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-AstroParticule et Cosmologie (APC (UMR_7164)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, Borexino, Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AstroParticule et Cosmologie (APC (UMR_7164)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Alimonti, G., Suvorov, Y., Et, Al., Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), and PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris
- Subjects
Low background detector ,Nuclear and High Energy Physics ,Photomultiplier ,Particle physics ,Liquid scintillator ,Physics - Instrumentation and Detectors ,[PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] ,Physics::Instrumentation and Detectors ,[SDU.ASTR.CO]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] ,Solar neutrino ,FOS: Physical sciences ,Scintillator ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Astrophysics ,7. Clean energy ,01 natural sciences ,High Energy Physics - Experiment ,Nuclear physics ,[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] ,High Energy Physics - Experiment (hep-ex) ,Low background detectors ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Nuclear Experiment (nucl-ex) ,010306 general physics ,Nuclear Experiment ,Instrumentation ,Borexino ,Nuclear and High Energy Physic ,Physics ,ICARUS ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,010308 nuclear & particles physics ,Astrophysics (astro-ph) ,Detector ,Astrophysics::Instrumentation and Methods for Astrophysics ,Instrumentation and Detectors (physics.ins-det) ,Liquid scintillators ,[SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] ,High Energy Physics::Experiment ,Neutrino ,Large Volume Detector - Abstract
Borexino, a large volume detector for low energy neutrino spectroscopy, is currently running underground at the Laboratori Nazionali del Gran Sasso, Italy. The main goal of the experiment is the real-time measurement of sub MeV solar neutrinos, and particularly of the mono energetic (862 keV) Be7 electron capture neutrinos, via neutrino-electron scattering in an ultra-pure liquid scintillator. This paper is mostly devoted to the description of the detector structure, the photomultipliers, the electronics, and the trigger and calibration systems. The real performance of the detector, which always meets, and sometimes exceeds, design expectations, is also shown. Some important aspects of the Borexino project, i.e. the fluid handling plants, the purification techniques and the filling procedures, are not covered in this paper and are, or will be, published elsewhere (see Introduction and Bibliography)., Comment: 37 pages, 43 figures, to be submitted to NIM
- Published
- 2009
24. The Quest for Neutrino-less Double Beta Decay
- Author
-
A. Pocar
- Subjects
Physics ,Antiparticle ,Particle physics ,Lepton number violation ,Physics::Instrumentation and Detectors ,High Energy Physics::Phenomenology ,Neutrino masses ,Physics and Astronomy(all) ,Nuclear physics ,MAJORANA ,Low background detectors ,Double beta decay ,High Energy Physics::Experiment ,Neutrino ,Radioactive decay - Abstract
We review the status and future of ongoing searches for neutrino-less double beta decay, a lepton-number violating nuclear decay whose existence would imply that neutrinos are their own antiparticles, i.e Majorana particles. The measurement of its decay rate is arguably the most sensitive laboratory probe of the absolute mass of neutrinos. Emphasis is given to the most promising detector technologies in the field which aim at exploring the inverted hierarchy region of neutrino masses.
- Full Text
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